Remove a non existing postgres cluster

http://serverfault.com –
I have a postgres 8.4 install on ubuntu 10.04.
I created a cluster on a disk that is not mountable anymore. Now I want to remove postgres but when I do apt-get remove postgresql-8.4 I get:
dpkg: error processing postgresql-8.4 (--remove):
Package is in a very bad inconsistent state - you should
reinstall it before attempting a removal.
Errors were encountered while processing:
postgresql-8.4
And when I do a apt-get upgrade is says:
Selecting previously deselected package postgresql-8.4.
Preparing to replace postgresql-8.4 8.4.9-0ubuntu0.10.04 (using .../postgresql-8.4_8.4.14-0ubuntu10.
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